jensen



R. '1ENSEN, DECD.

A. Mr masi". Aummsanmx.,

CARBURETER., APPLICATION FILED Juni 2o. 1916. RENEWEDSEPT. 13. 191s.

rPaftmzmad June I5, 1920.

2 SHEETS-SHEET l.

Patented June 15, 1920 2 SHEETS-S HEET 2. I

'i 'o .all whom it ma concern UNITED STATES PATENT oi=i=i Y 'Rasmus JENsEmoF 'Los ANGELES, caLIEoENIA; AGNES il. JENSEN IADMINISTBATMX OF SAID BASMUS JENSEN, DECEASED.

CABBURETER.

Application led .Tune 20, 1916, Serial No. 104,676.

VBe it known t at I, RAsMUs JENSEN, a citizen of the United States residing at Los Angeles, in the county of ros Angeles and State of California, have invented a new and useful Carburetor, of which the folioivmg is a specification. Y

An object of this invention is thecarbureting of liquid hydrocarbons. y

Another object is to so `effect the carbureting that the right proportions of' liquid hydrocarbon and air will be automatically produced under varying engine speeds and under varying atmospheric tem eratures. y

Another object is to effect tie foregoing by a construction of maximum simplicity and effectiveness.

T he accompanying drawings illustrate the invention:

Figure l isa planiview of a carbureter embodying the invention, one of the fastening ears being broken away for clearness of illustration.

Fig. 2 is an elevation of Fig. 1 looking at the thermostat side. the screw for ad'usting the needle valve and the seat for sai( screw A being shown in section for clearness of illustration.

Fi 3 is an elevation mainly in section on line indica-tedby ac3-aa. Fig. 1, a portion of the throttle lever being broken away to contract the view.

Fig. 4 is a plan section on line indicated by :ir-of, Fig. 3.

Fig. 5 is an inverted plan section on line indicated by vnl-, Fig. 3.

F ig. 6 is a fragmentary section on line indicated by Fig. 4.

There is provided a substantially cylindrical or other suitably shaped ioat chamber 1 ating at one side an o set inlet portion 2 llto the Vupper side of which is screw-threadet. a valve chamber 3 having'a flanged head i resting against the upper end of a fuel inlet memben in the form of a T 5 that is mounted on the top of the oif set portionQ and that is pro vded with an opening (i adapted tube con cted to a source of fuel supply. -with a need valve plug T adapted to close on a seat 8 to control the admission of liquid fuel fr m the interior of the member l5,.,thifollgli a port 9 which opens from the or of the member 5 to the interior of ve4 chamber1 3.

valve chamber 3 is provided Specincation of Letters Patent. Patented June 15, 192e),

Renewed Septemben 13, 1919. Serial No. 828.648.

The lowerend of the needle validplug .17 rests upon a furcated arm 10 pivo at 11 iii the sides of the off set portion 2, the furcations of said arm 10 bein in the shape of quadrants so as to stradd e an annular float 12 which rises and lowers in the float chamber 1 in accordance with the level of liquid hydrocarbons in said iloat chamber, and said furcations of the arm 10 being ivoted at 13 to lugs 14 of the iioat 12. hns movement up anddown of the float 12 moves the needle valve 'i' so as to control the level of liquid hydrocarbons in the float chamber in a manner well understood in the art.

The float chamber 12 surrounds an outer air pipe 15 which projects upward from the bottom of the float chamber 12 to a level slightly above the rim of said float chamber, said air pipe in the instance shown in the drawings being integral with the float chambei' l, though it 'is understood that it need not necessarily be so. The bottom of the float chamber l axially thereof is provided with a circular opening 16 communicating with the interior of the air pipe 15. Into the opening 16 is inserted a tubular boss 17 projecting from the upper side of a laterally projecting air inlet member 18 having ports 19 through which to receive atmospheric air,

said ports 19 being controlled by a sleeve valve 20. Preferably the inlet member 18 will be connected at its outer end to a source of hot air supply, such, for instance, as a chamber, not shownsurrounding the exhaust oi the engine to which the carburetor is connected.

The air-pipe 15 is provided in its interior from side to side thereof with a bridge piece 21. which. as shown in the drawings; may be integral with the. air pipe 15, said bridge piece being provided with a downwardly projecting stud 22 extending axially of the float chamber 1 and projecting through the opening lo and projecting through au orifice 23 in the bottom of the inlet mem ber 1H. there being a nut .24 screw-threaded onto the. projecting end of the Stud 22 and against the bottom face of the inlet member to hold said inlet member securely in place. lt is clear that the. inlet member may be adjusted to dilerent positions relative to the vHout chamber l around the* periphery thereof.

The bridge piece 21 is provided trans versly of the axis of the Hoot chamber 1 stance integral therewith is a primingcup 27 which at its lower end joins the nozzle `ust above the bridge piece 21 in a curved ottoni portion 28, there being a port 29 from the interior of the nozzle to the space within the priming cup 27. The rim of the priming cup is on a evel with the rim of .the air pipel 15, and the priming cup is spaced from the air pipe so as to form an annular passage communicating at its bottom with the passages 27 at the`sides of the bridge piece.

Into the priming cup 27 between the walls thereof and the nozzle 26 there is inserted an inner air ipe forming an air deflector 30 which pro]e ets downward from a partition 31, said partition forming the top or cover of the Boat chamber 1 and also forming the bottom of a-tubular mixing chamber 32 having legs 33 joined together at their lower ends by an annular flange 34, there being screws or equivalent at the edges of said flange' and partition threaded into the float chamber 1 so as to tightly se eure these parts together and so that access may be readil Y had to the interior of the float chamber y removing the screws, mixing chamber and partition.

It is clear that the mixing chamber 32 and float chamber 1 may be turned relative to one another to change the position of the inlet 6 circumferentially of the mixing chamber.

The air pipe 30 extends upward above 'the partition 31 and terminates in helicoidal venes or blades 86 so as to cause any fluid discharging upward through the bore 37 ot' the air pipe 30 to be given a whirling motion in order to more thoroughly mix the liquid particles of hydrocarbon and air coming through said bore.

The legs 33 are spaced apart from the tubular lower end 3B of the mixing chamber 32 and extend below the level of said lower end, said tubular portion bcing spaced apart from the partition 31. to form an annular' auxiliary air port il!) which surrounds the upper end of the air pipe lll and opens from the exterior of the mixing chamber between the legs 33 into the interior of said mixing Chamber between thc lower edges of the vanos 36 so that whatever air enters the port 39 will be given a whirling motion the same as the mixture passing through the bore il? and will dilute said mixture to make it less rich in hydrocarbons. The space between the legs -lfl and the tulnilar portion 38 forms a guide for an anni lar auxiliary air controlling valve.

40 in the form of a. ring adapted when in its lowermost )osition to close the port 39 and adapted when in its uppermost position to entirely open said port, said valve being operated to open by suction of the engine to which the carburetor is attached and heilig operated to close by gravity. The higher the engine speed and consequently the greater the suction the greater the degree of opening of the port 39 will be as is readily understood.

T he valve 40 is provided in its upper edge with sockets 41 to accommodate nuts 42 screw-threaded on the upper ends of rods 43 which pass downward through the valve and through the artition 31 and through the Hoet 12 to t at portion of the float chamber belowr the float, the lower ends of said rods being screwthreadcd into a plunger 44 which together with the float chamber 12 forms a dash-pot to prevent sudden and irregular action of the valve, the li uid hydrocarbon in the ioat chamber retart ing the up and down motion of the plunger.

The outlet of the nozzle 26 iscontrolled by a needle valve 45 which is sliftably mounted in a cylindrical guide 46 iormed7 in this instance. integral with the vanes 36. Between the head 4T of the needle valve and a shoulder 48 near the upper end of the guide 46 is a coil spring 49 tending to open the valve 45.

The valve 45 is operatively connected to the valve 4() and the connecting means are of such character as to give a definite ratio of movement between the valve 40 and the valve 45. so as to secure definite proportions of air and fuel at dierent degreesof opening of the valve 40 and accordingly at different engine speeds. For this purpose the u per end of the valve 45 is'engaged by a nger 50 fixed to alroek-shaft 51 which is journaled at 52 (see Fig. 1) `in the mix ing chamber 32 and projects outward from the side of said mixing chamber. (')n the outer projectingr end of the shaft 51 is loosely mounted an army 53 connected' by curved thermostatic leaves 54- to a pin 55 provided with a roller 56 adapted to engage a track 57 formed by an outward turned flange of an adjustable link 58 having a slot 59 to accommodate an adpisting screw G() which is screw-threaded into the outer face of the valve plug 10, the expansive force of spring 49 operating to press the roller 56 against the track 57. The slot 59 and screw 6U afford means to regulate the angulurity of the track 57 relative to the axis of movement of the valve 4() und said angularity of the track 5T, as is clear, allows the roller 56 to more in a curved path around the axis oi' the rock-sha ft 51 when the valve 40 moves up and down. The degree of opening of thc needle valvc l5 relative to the degree of opening of the valve 40, when the valve 62 of a. seat63 which is engaged by an adjusting nut 64 screw-threaded onto the free end of the stud, said seat 63 forming the outer end of an angularly bent arm 65 that is fastened by a set-screw 66 or equivalent to .the rock-shaft 51. .Thus turning of the nut 64 in one direction will allow the needle valve45 to open farther and turning of said nut in the opposite direction will cause the linger 50 to de ress the needle valve against the expansive orce of the spring 49 so as to more nearly close the nozzle outlet, without affecting the position of the valve 40. This gives the fuel adjustment for lower engine speeds. Adjustment of the angularity of the track 57 will change the ratio of opening of the needle valve and the valve 40, it being clear that for a richer mixture at higher engine speeds the angularity of the track will be made greater relative to the path of movement of said track and that for a less richmixture at hi rher engine speeds the track will be adiustedn' to bring its working face more nearly into position to coinl eide with the path of movement ofsaid track.

Under higher temperatures the thermostatic leaves 54 will expand lto automatically reduce the degree of opening of the nozzle outlet relative to the degree of opening of the port 39, and under lower temperatures the leaves,\vill contract to increase the degree of o ening of the nor/.Zle outlet relative to that o the port 39, thus making the mixture less rich under higher temperatures and richer under lower temperatures in accordance with engine requirements as is well understood in the art. i

The valve 40 is provided with a shouldered stud 67 to journal a roller 68 which bears against one of the faces of one of the lens 33 so as to prevent rotation of said valve under the pressure transmitted through the roller 56 from the spring 49.

If desired a coil spring 69 may be placed around the stud 61 between thev seat 63 and the arm 53 sons to hold the nut 64 tightly in its socket and prevent turning thereof under the influence'of vibrations and shocks. The mixing chamber 32 is provided at its outlet end with ears 70 for attachment to the mixture conducting pipe of the engine with which the device is used. The mixing chamber 32'is also provided at its discharge end wlth a shaft 71 having mounted thereon a butterfiy throttle valve 72 for regulating the volume of mixture passing out of the carbureter so as to control the speed of the engine, the shaft 71 being provided with an arm 73 whereby turning of the shaft 71 may be effected.

In practice, assuming that the fuel inlet 6 is connected to a suitablesource of fuel supply, not shown, and that the air inlet 18 is connected to a chamber surrounding the exhaust of the engine and assuming that the discharge end of the mixing chamber 32 is connected to the intake pipe of an internal combustion engine, the liquid fuel will rise in the float chamber 1, in the nozzle and also in the priminwcup 2T, for instance, to, the level indicate at a, Fig. 3. 'hen the en Uineis put into operation in a manner well known 1n the art and the throttle valve is o ened but slightly, the Vsuction of said englne will draw liquid fuel from the nozzle 26 and also from the priming cup 27 into the upper end of the air pipe 30 and thence between the vanes 36 which ive the atomized fuel a whirling motion. Vhen all of the liquid fuel in the priming cup 27 has been sucked therefrom, air entering through the inlet member 18 will .be sucked upward around the priming cup and thence downward inside of said cup and thence upward through the air pipe 30 and between the vanes 36 to be given a whirling motion and intimately mixed with the liquid fuel simultaneously sucked from the nozzle 26.'

If the throttle valve 72 now be opened to a greater degree, the greater suction produced by the engine in the mixing chamber 32 opens the valve 40 to admit auxiliary air through the port 39 into the intervane spaces where said auxiliary air is thoroughly mixed with the mixture passing from the upper end of the air pipe 30 to dilute said mixture. The higher the engine speed the greater will be the opening of the port 39 as is readily understood, and, as has been stated hereinbefore, when the valve 40 moves to open the port 39, the needle valve 45 is raised a proportionate degree to allow the increased suction to draw a reater volume of liquid fuel from the nozz e 26.

1t is noted that the hot air passes through the air pipe 15 and, that because of said air pipe extending through the float chamber, the liquid fuel is reheated so as to enhance the gasification o ized.

It is believed that the foregoing will enable those skilled in the art to which the invention appertains to make and'use the invention, it being understood that changes may be made wit in the scope and spirit of the appended claims.

I claim:

1. In combination, a carburetor having air and fuel valves, a track adapted to be connected to the air valve of the carburetor, a rotatively mounted shaft, a finger on the shaft adapted to govern the amount of opening of the fuel valve of the carburetor, 'and thermostatic leaves to turnA the shaft` prosaid fuel when it is atom# PCI track and leai es being so disposed that movement of the track will cause the leaves to turn the shaft.

2. ln combination, a oarbureter having air and fuel valves, a track havingr a slot, means to pivot the track to the air valve of the varbnreter, means to adjustably hold the track agaiut turning on its pivot, a rota tively mounted shaft, a finger on the shaft adapted to govern the amount of openin r of the fuel valve of the carburetor, and thermostatie leaves to turn the shaft provided witli a roller to engage the track, said track and leaves being so disposed that movement of the track will cause the leaves to turn the shaft.

3. In combination, a carbureter'liavin r air and fuel valves, a rotatively mounted s aft, a finger on the shaft adapted to govern the amoun't of opening of the fuel valve of the earbureter, an arm fixed to the shaft, an arm rotative on the shaft, thermostatie leaves fastenedv to the rotative arm, means adapted to connect the free end of the leaves to the air valve of the oarbureter, a spring between the fixed arm and the rotative arm to tend to turn the rotative arm away from the fixed arm, and means to limit the turning of the rotative arm relative to the fixed arm.

4. 1n combination, a carbureter having air and fuel valves, a rotatively mounted shaft,

a finger on .the shaft adapted to govern the amount of opening of the fuel valve of the carbureter, an arm fixed to the shaft, an arm rotative on the shaft, thertnostatio leaves fastened to therotative arm, means adapted to connect the free end ofi' the leaves to the air valve of the carbureter, a spring between the fixed arm and the rotative arm to tend to turn the rotative arm away from the fixed arm, a stud projecting from the rotative arm throu h the fixed arm, and a nut screw-threade( on the stud to limit movement of the arms away from one another.

5. In combination, a carburetor having air and fuel valves, a rotatively mounted shaft, a finger on the shaft adapted to govern the amount of opening of the fuel valve of the oarbureter, an arm fixed to the shaft and provided with a socket, an arm rotative on the shaft, thermostatie leaves fastened tA the rotative arm, means adapted to renne(- the free end of the leaves to the air vulve ofthe earhureter, a spring between the fixed arm and the rotative arm to tend to turn the rotative arm away from the fixed arm, a stud projecting from the rotative arm through the socket, and a nut mrow-threaded on the stud and seated in the socket to limit movement of the arms away from one another.

Signed at Los Angeles, California, this 13th day of June, 1916.

RASMUS JENSEN.

Witnesses:

GEORGE H. HILns, ANNA F. SOHMIDTBAUER. 

